Hello @Mark Ingram, Thank you for your post and information.
I've recently published :  And I have a request for you and your team that implies a very small dev effort. Would it be possible to add a simple toggle info to our accounts (serif accounts, not forum) to add our targeted OS ?
Example, I would love to have my purchases count as towards Linux platform not Windows. Since you already implicitly do that for Windows / Mac OS, it would be nice to have an explicit button to indicate for Windows purchases that they are used by mainly Linux user.

I know how complicated it can be to get real meaningful stats. And with such a topic, you might even end with bots or false positives, people that would never actually buy your product. Have a little chat with your Marketing & Business team, but I think that metric could actually help. And even if you don't do anything with it, I would actually feel pretty great about it

I got this idea from Steam itself. When a user on Linux purchase a Windows game, it might or might not work on Linux, but that doesn't matter, Valve is counting it as a Linux purchase, and seriously that is awesome. Because that's a proper metric to have that reflects reality.

With that, have an amazing day, keep up the good work ! I can't wait to try publisher, don't get me wrong, I love Scribus, but I was used to indesign, and your tools are simply AWESOME. This is why I vote with my wallet and keep purchasing your products.
Note 1: I am absolutely against the crowdfunding, this is not the way to go for a closed source project. If you want to go that route, let us vote with our wallet and purchase a Linux version with no promise of delivery, right on your page next to the other ones.

Note 2: People speaking about Akira... That project is a splendid demo on how NOT to do a modern design tool, specially in the Linux eco-system.
No cross platform, uses a specific tech that very few devs work on (VALA) and is not desktop agnostic. Just that should be a show stopper for anyone with a little love for all the diversity that exists in the Linux eco-system.
In addition to that : No proper feature set, no roadmap, no real activity in their code base (all branches included). https://github.com/akiraux/Akira .
TLDR: doing it right is not easy, and asking for money is not enough.

Want a good example on how to do it right ? Krita.org and their MANY successful crowdfunding. 
- 2014:  20k Euros (Accelerate dev) https://www.kickstarter.com/projects/krita/krita-open-source-digital-painting-accelerate-deve
- 2015:  30.5k Euros (Let's make it faster) https://www.kickstarter.com/projects/krita/krita-free-paint-app-lets-make-it-faster-than-phot
- 2016:  38.5k Euros (New text, new vector tools. svg2 support, etc.) https://www.kickstarter.com/projects/krita/krita-2016-lets-make-text-and-vector-art-awesome
- 2018 : 27k Euros (Squash bugs) https://krita.org/en/fundraising-2018-campaign/ 

That's 116k Euros in 4 years of crowdfunding (and I most certainly forget some others they did). This doesn't included direct donations or steam purchases.
That's how you ask for money, your first build something great, then you lay down a great plan for growing up and then you ask for money.